赞题库-背景图
单项选择题

In perfectly competitive industries, what is the most likely long-run effect of a permanent decrease in demand

A. Price decreases.
B. Firms incur economic losses.
C. The number of firms decreases.
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单项选择题When a firm operates under conditions of pure competition, marginal revenue always equals:

A. price.
B. average fixed cost.
C. average variable cost.

单项选择题A firm operating under conditions of pure competition will:

A. face a vertical demand curve.
B. generate zero economic profit in the long run.
C. produce a quantity where marginal revenue is less than marginal cost.